Precious-metal alloy.



,vide an alloy as a substitute for lit;

a non,

J WILLIAM E. IVIOWREY, OF ST. PAUL, MINNESOTA.

PRECIOUS-METAL ALLOY.

.No Drawing.

To all whom it may concern:

Be it known that I, WILLIAM E. Mownnr, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Precious-Metal Alloys, of which the following is a specifi cation. v r I This invention relates particularly to alloys designed for use as substitutes for platinum in the manufacture of jewelry, scientific instruments','dental supplies, electrical apparatus, etc. 1

One object of my invention is to provide an alloy which will be cheaper than platinum but shall not be inferior to it for the purposes for which it is designed.

Another object of my invention is to provide a substitute. for fplatinum which with certain percentages 0 materials used shall possess a color such as" will render it indistinguishable from platinum.

Another object of my invention is to proplatinum that shall be non-oxidizable.

- \Vith these and incidental objects in viewthe invention consists of certain combinations of metals as hereinafter set forth in this specification. I

In producing mfimproved alloy I fuse togetherpalladium, silver and gold, and the proportions of these metals maybe varied Without departing from my invention, as I alloy ofthese three metals combined in any proportion.

To produce. an alloy for dental work ex- Specification of Letters Patent.

Application filed April'15, 1916. Serial It'o. 91,470.

Patented (Oct. as, rare.

clusively, I prefer to use 5% of palladium, 45% of silver and 50% of gold. This combination produces a metal that 'is satisfactory for all dental work, is considerably cheaper than platinum, is easily workable,

possesses a tensile strength sufiiciently high for the-purposes for which it is designedyis capable of receiving a high polish, and has wearing qualitiesequal to those of platinum. As an alloy to be used in electrical work, jewelry work, and certain dental work, I prefer a combination'of 15% of palladium, 35% of silver, and 50% of gold. This combination is practically indistinguishable from platinum andhas all of the qualities needed for the classes of Work for which it is designed; lVith either of the combinations herein set forth, or in any of the other combinations that may be made Within the scone of this invention, the metals are melted together in templates any mixture of these three metals, I

as set forth in the following claim.

vClaim:

An alloy ,for dental, jewelry and electrical purposes, comprisingsubstantially 15 per cent. of palladium, substantially 35 per cent. of silver, and substantially 50 per cent.

of gold fused together. i

' WILLIAM E. MOWREY. 

